Booking iframe parameters

Hello, I am new to booking and I am integrating it into my application through an iframe.
I have the following doubt:
It is possible to pass as a parameter in the iframe some identifier of the staff that I want to attend the appointment, I do not want the client to select the person with whom they should book, i want to pass by default.

Also, where can I get the list of parameters that can be passed to the iframe?

Thanks in advance.